Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 f83ad58372165b89…

MALICIOUS

RTF / .DOC

218.4 KB
MD5: d8b87f2277632f90758638c894c24a8a SHA-1: 5b4b7acfb0813356557c9a69d7fd8fdc8eed889c SHA-256: f83ad58372165b89222b164f3da6a0b4edad02409d13df77e713ad860a6489e4
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The RTF document contains OLE object data and uses \objupdate to force OLE activation, indicating an attempt to execute embedded content. A suspicious extracted artifact, objdata_00_off000010f8.bin, was identified. The attack pattern suggests a malicious RTF document leveraging embedded objects for payload delivery.

Heuristics 3

  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000010f8.bin
2789745007fe60e9b022b19595869b4b1cf9c19832ec78405b07ae3c485d89e1
rtf-objdata-decoded RTF \objdata at offset 0x10F8 109554 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.